Which of the following statements best describes the first law of thermodynamics
ID: 497710 • Letter: W
Question
Which of the following statements best describes the first law of thermodynamics? Choose one or more: A. ?E = Efinal – Einitial B. The work done by a system equals the work done on the surroundings. C. The energy gained or lost by a system must equal the energy lost or gained by the surroundings. D. The sum of all of the kinetic and potential energies of all of the components of a system is constant. E. ?Euniv = ?Esys + ?Esurr = 0 F. ?E = q + w G. The total energy of the universe is decreasing. H. Energy can be neither created nor destroyed, but it can change from one form to another. I. Heat released by the system is absorbed by the surroundings.
Explanation / Answer
Which of the following statements best describes the first law of thermodynamics? Choose one or more:
A. E = Efinal – Einitial --> True, which states energy will not be created/destroyed
B. The work done by a system equals the work done on the surroundings. True, work done BY a is work done ON b
C. The energy gained or lost by a system must equal the energy lost or gained by the surroundings. True, their relationship is mutual Ea = -Eb and -Ea = Eb
D. The sum of all of the kinetic and potential energies of all of the components of a system is constant. False, we must account for internal energy as well
E. Euniv = Esys + Esurr = 0 True, there is no creation of energy
F. E = q + w . Only true when we account expansion work of a system as positive, W = P*dV becomes positive, so Q + w
G. The total energy of the universe is decreasing. False, it is constnat
H. Energy can be neither created nor destroyed, but it can change from one form to another. True, they only change their forms
I. Heat released by the system is absorbed by the surroundings. True, heat lost is heat gained bya other system
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